Derrick.



PATENTED JAN. 23, 1906.

J. s. ALLEN, JR.

DERRICK;

APPLIOATION FILED 11.24, 1905.

3 SHEETS-SHEET l.

, PATENTED JAN. 23, 1906. J. s. ALLEN, JR.

DERRICK.

APPLICATION TILED 10.11.24, 1905.

3 SHEETS-SHEBT 2.

JWZJHZZe/ J 5 756? v 2 Mmy PATENTED JAN. 23, 1906. J. s. ALLEN, JR.

DERRICK.

APPLICATION FILE]? KAILM, 1905.

3 SHEETS-SHEET 3- EST AVAILABIE CQFY -To all whom it may concern:

Be it known that I, JACOB S. ALLEN, Jr., a

delphia, Pennsylvania, have invented certain Improvements in Derricks, of which the following is a specification.

. The main object of my invention is to construct a derrick of the A-frame type with a short. mast to bring all the pivot-points in alinement and to properly support the bullwheel and the boom.

A further object of the invention is to provide a step-hearing for the mast which can be kept lubricated at all times; and a still fur- {her object is to provide simple and effective means for shifting the derrick on its tracks.

These objects I attain in the following manner, reference being had to the accompanying dmwin s, in which item l is a side view of my improved derview. flooring and the house structure removed for the pun ose of showin the mechanism. Fig "5' 4 is a dc ra led sectionai view of the stepbear ing for the mast. Figs 5 is a pin-n view of Fig. 4. Fig. 6 is a plan view of the-step illustmted in F g. 4. Fig. 7 is a side. view illustn'iting the upper bearing of the mast. Fig. 8 is a section on the line 8 8, Fig. 7. Fig. 9 is a side view of the upper portion of the A- ffame. Fi 10 is an end view of the upper Grtion of i: re A-frame, and Fig. 11 is a view of a modification of the connection between theA-frame and the strut-legs.

5 i A is the main frame of the derrick supported by suitable wheels a 0/, which are mounted on the usual tracks. These wheels in the present instance are double flanged, and the o renal whe ls have trunnions mounted in boxes carried by the said frame A. The central wheels a are the drivingwheels and are -mounted on a transverse shaft a which car- .r es a sprocket-wheel a, around which passes 4 a chain 0 from a sprocket-wheel on the hoisting mechanism of the structure, which will be described hereinafter:

A is the vertical frame, mounted at the 7 forward end of the main frame A and is Sup- 5o ported by struts A", which extend to a pqi it' at therear of the frame A, as illustrated. in

Fig. 1. This type of derrick is known as an A-frame derrick. The A-frame in the DERRICK.

Specification of Letters Patent."

citizen of the United States, residing in Philarick. Fig. 2 is an end view. Fig- 3 is a plan These views are illustrated with the.

l grooq i trim g, which is connecte blocK present instance has a cross-beam 0 about I "midway oi its might. and between this I get asg. pivot for'theboom, and byabolt 9 I10 UNITED STATE sang ENT OFFICE. L

JACOB S. ALLEN, JR, OF PHILADELPHIA, PENNSYLVANIA.

Patented Jan. 23, 1906.

Application filed March 24, 1905. Serial No. 261,841.

cross-beam c and the beams c at'the base offoot-block and has an internal upwardly-projecting flange d, which in the present instance has a conical outer surface fitting the conical openingin. the end of the pivot of the footblock. The. step, as well as the pivot, has an open center for the passage of the ropes for operating the boom and the bucke The lower portion of the pivot is eniarg forming a shoulder (1 near the upper en over which extends a cap-pla-i. bolted to the step in any suitable manner. The pivot, as will be noticed 1n Fi 4, does not snu ly fit the step-block, but tl ie re is sufficient p ay to ment of the boom. This loose fit allows a sufficient qlpantity of the lubricant to be retained in t 'e step, so as to thoroughly lubri: cate the pivot at all times, the internal proj ecting flange d preventing the escape of lubricant and the cap-plate (1 which extends entirely around the pivot, prevents access of dust or dirt to the bearing, thus keeping the hearing comparatively clean. The cap-plate (Z also tends to hold the pivot in place in the step-bearing. The mast B is mounted in a pocket e in the fo t-block E and is secured. therein by transverse bolts (2 The foot- -block has four projecting bearingstwo outer f carried b brackets d, projecting from the under side 0 the step D. From these sheaves the ropes pass to the drums described hereinafter. The lower end of the boom F is cut away, so as to accommodate the bearings e and the sheaves f f the projecting portions of the boom fitting betr"'een the inner bearingc and the outer hearing a f 4 not'only acts as a pivot for the boom, out also for the sheaves ff as illustrated clearly in Fi 5. Carried by the foot-block E is the bullheel G. The body of this bull-wheel is In e in the-ordinary manner, havinga l to the footto beams g'. The beams. are secured to th afoot-block by the pivot-pinsf", which A pivotpin (may which passes through the beams directly back of the foot-block, as illustrated in Fig. 4 but it will be understood that other means of fastening the bull-wheel to the block may be used without departing from my invention. Extending from the rim of the bull-wheel G to the mast are diagonal braces g and g".

These braces are secured to the bull-wheel by angle-plates (illustrated in Fig. 2) and bolted to the mast in any suitable manner. The braces g extend on each side of the boom F and not only form a brace for the bull-wheel, but act mainly as guides for the boom, relieving the pivot of the strain incident to the turning of the mast and boom when a load is being elevated and carried by the boom.

I construct the pivot'for the upper portion of the mast in the manner clearly shown in Figs. 1, 2, 7, and 8, in which it is a vertical pivot mounted in a socket H, secured to the securely attach the parts together. The

lower bolt h is a s'trai ht bolt which passes through the pivot-pin as well as through the socket H, so as to prevent the turning of thepivot-plin in the socket. This pivot is in line with t e pivot e of the foot-block E, and the bearing 0, being mounted on the face of the A-frame, enables the boom to swing almost a complete half-circle. I preferably form the connection between the upper portion of the A-frame and the strut-legs A somewhat in the same manner as the upper pivot for themast.

I I are sockets for a vertical pin 11. These two sockets are secured to the A-frame by U-shaped bolts in a similar manner to the socket H on the mast, and they are spaced a sufficient distance apart, as illustrated in Figs. 1, 9, and 10, to allow for the reception of the strap K, carrying the sheaves 7c k is. To the upper end of each strutleg A is secured a gooseneck m, which is bent and has a hole for the reception of the pin 11. This pin projects a sufficient distance above the socket I to pass through both goosenecks, thus rigidly connecting the struts A and the A-frame A. In some instances the pin '5 may extend to such an extent that the strap K can be placed between the socket I and the oosenecks, as illustrated in Fig. 11, in Whic case the lower socket I is dispensed with.

Referring now to the driving mechanism,

M is the frame carrying the said mechanism,

having bearings for, the.zshoisting-drum N, the ropes n n from whichpass around the sheaves f f 2 on the foot-block 't'o theslre'tfve-n on the end of the boom, around the pulley M, and around the sheaves 10?, and attached to the pulley-block in the present instance, which is provided with a hook to engage the load.

P is the'boom-drum, having its bearings mounted in the frame M, and the rope p from this drum passes around one of the sheaves f, around the sheave f, both carried by the foot-block, then passes around the sheaves k k k onthe strap K, and around sheaves p p on the strap p, to which the said rope is attached, this strap being pivoted to the end of the boom, and when the drum is operated the boom can be raised and lowered.

S is the bull-wheel-rope drum. The rope s passes around the bull-wheel G and the guide 8, and both ends of this rope are attached to the drum S.

M in the present instance is an electric motor, and there is clutch mechanism between each one of the drums N, P, and S and the motor, so that any one or all of the drums can be thrown into gear with the motor. This mechanism is common to this type of derrick.

The drum S is mounted loosely on the shaft S and is locked to the shaft by a clutchsleeve 8, operated by a lever s. This clutchsleeve is double-faced, and one face has teeth which mesh with the drum, while the other face has teeth which mesh with teeth on the sprocket-wheel s around which-passes the drive-chain a, leading to the sprocket-wheel a carried by the shaft a so that when the clutch-lever s is thrown so that the sprocketwheel 8 is locked to the shaft S motion will be imparted to the axle a and will cause the entire derrick-frame to travel on the tracks. When the clutch is thrown out, however, the hoisting mechanism can be operated without traversing the derrick.

It will be seen by the above description that I am able to construct a very simple and effective derrick of the A-frame type, using a very short mast and so bracing the bullwheel and the mast as to make them perfectly rigid, at the same time utilizingthe braces as a guide and support for the boom, also to provide means for keeping the lubricant in the step-bearing and to provide a simple and substantial pivot for the mast and a substantial connection between the A- frame and the strut-legs. Furthermore, I provide means by which the derrickframe can be shifted by throwing the wheels into and out of gear with the hoisting mechanism, as desired.

I claim as my invention- 1. The combination of a base-frame, an A- frame and struts supporting said A-frame, a step, a relatively short mast supported in the plane of the A-frame, a foot-block carrying the mast and mounted in the step, a pivot by which the upper end of the mast is secured to the A-irame, a bull-wheel carried by thenast, braces extending from the bull-wheel to the mast, and a boom pivoted to the footblock and mounted between the braces, substantially as described.

The combination in a derrick, of a baseframe, an A-frame carried thereby, a step, a

short mast, a foot-block having its pivot mounted in the step and secured to the mast, a boom pivoted to the foot-block, a bullwheel secured to the foot-block for turnin the mast, a socket secured to the upper en of the mast, a pin in the socket and projecting above the mast, a bearing secured to the A-frame into which the pin projects, the pin being in line with the pivot of the foot-block and the mast being out of line, substantially as described.

3. The combination in a derrick, of a baseframe, an A- frame carried thereby, strutlegs extending from the upper portion of the A-frame to the rear of the main frame, a socket at the upper end of the A-frame, a pin mounted in the socket and projecting above the end of the A-lrame, gooseneck carried by each strut-leg and having an opening for the passage of the pin, a cross-bar on the A- frame, a short mast mounted between the cross-bar and the base of the frame, a stepbearing for the lower portion of the mast, a pivot for the upper portion of the mast, and a 00m, substantially as described.

4. The combination in a derrick, of a baseframe, an A-frame, strut-legs extending from the upper portion of the A-frame to the rear of the base-frame, a step-bearing mounted between the legs of the A-frame, a foot-block having a pivot mounted in the stepbearing, the step-bearing and the foot-block having an open center for the passage of the hoistingropes, a boom carried by the foot-block, the step-bearing having an internal upwardlypi'o iecting flange forming an annular cavity for the reception of the pivot and for the aceumulation of a lubricant so that the stephearing will be lubricated at all times, su stantially as described. 5.- "The combination in a derrick, of a mast pivoted at the u per end to the frame and havmg a foot-bloc at its lower end, a hollow ivot rojecting from the under side of the oot-b ock, a step-bearing having an open center and having an annular internal flange forming an annular cavity into which the pivot of the foot-block extends, said pivot having a shoulder near its upper end, and a cap secured to the foot-block and extending over the shoulder of the pivot, forminga dustguard for the bearing, substantially as described.

6. The combination in a derrick, of apivot, a mast, a boom hung from the mast, a stepbearing for the lower end of the mast, a

extending through-i-the'fsocket and through the mast, and a bearing on the frame for the reception of the pivot-pin, substantiallyas described.

7. The combination in' a derrick, of a frame, a mast, a boom pivoted to the mast, a ste ll-bearing for the lower end of the mast, a soc et at the upper end ofthe mast, said socket having a vertical opening, a pivot-pin mounted in the opening, U-shaped bolts securing the socket to the mast, said socket having projections surrounding each bolt and entering the mast, and a bearing secured to the frame of the derrick by U-shaped bolts, said bearing arranged to receive the projecting pivot of the mast, substantially as described.

8. The combination in a derrick, of a mast, an A-frame, strut-legs, asocket secured to the 'A-frame, U-shaped bolts securing the socket to the said frame, a pin pro'ecting above the A-frame, goosenecks carrie by the strut-legs through which the said pin passes, the pin also acting as a support for the sheave-strap at the u per end of the A-frame, substantially as escribed.

9. The combination in a derrick of a main framawheelssupporting the said irame, one set of wheels being the driving-wheels lfoisting mechanism carried by the frame and geared to the said driving-wheels, an A-frame at the forward end of the derrick, strut-legs leading from the upper portion of the A- frame to the rear of the main frame, a transverse beam on the A-frame, a short mast pivoted to the said beam, a foot-block secured to the lower end of the mast having a pivot, a ste bearing for the pivot, said step-bearing an foot-block having an open center, sheaves carried by the foot-block and by the step-bearing, a boom pivoted to the footblock, an. upwardly-extending internal flange in the step-bearing projecting up into the opening in the pivot and formlng an annular cavity for retaining a lubricant, a plate forming a dust-guard secured to the foot-block, a socket at the upper end of the mast and secured thereto by U-shaped bolts, a pivot-pin mounted in the socket and projecting above the mast, a bearing in the cross-bar of the main frame for the reception of the pivot, the upper and lower ivots of the mast being in line, a bull-wheel carried-by the mast, and braces extending from the mast to the rim of the bull-wheel, the said boom extending between the braces, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILL. AIBARR, Jos. H. KLEIN.

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